为了解辖区人群结核免疫状况，评价结核病防治效果，为以后开展结防工作提供参考，故做本次调查。1试验对象与方法1．1随机抽取幼托、小学、中学和生产单位四个年龄组共228人（均系本地生活3年以上，无结核病史，无正在使用免疫抑制剂者）。1．2给受试者皮内注5IU的BCG—PPD（ In order to understand the status of tuberculosis immunity among the population in the area, evaluate the effect of tuberculosis control, and provide reference for the future development of anti-tuberculosis, we will do this survey. 1 Test subjects and methods 1.1 A total of 228 students in the four age groups of childcare, primary school, middle school, and production unit were randomly selected (all of whom had a local life of more than 3 years, no history of tuberculosis, and no immunosuppressants were being used). 1.2 Intradermal injection of 5 IU of BCG-PPD to the subject (